Department of Food EngineeringLaboratory for the Biological Waste Water Treatment

Place

Zagreb

State

Croatia

Scientific field, discipline, subdiscipline

BIOTECHNICAL SCIENCESBiotechnology

Study programme type

university

Study level

undergraduate

Study programme

Biotechnology

Academic title abbreviation

univ. bacc. ing. biotechn

Genre

undergraduate thesis

Language

Croatian

Defense date

2011-07-13

Parallel abstract (English)

A long time ago people have noticed that the presence of nitrogen and phosphorus compounds in wastewater can cause changes in the environment. One of the methods of removing those compounds from wastewater is SBR (Sequencing batch reactor). SBR is a wastewater treatment system which works in five phases. Those phases are: fill, react, settle, draw and idle. It enables the treatment of wastewater coming from different sources with a slow or changing flow.The main advantage of SBR is that all wastewater is treated in the same tank that can work in aerobic, anaerobic and anoxic conditions. As in all other wastewater treatment systems, preprocessing and filtering is needed to remove large waste fragments and dirt, such as gravel, sand, oil and fats. This thesis describes SBR, how SBR works, its advantages and disadvantages, operating characteristics, monitoring parameters and chemical processes which take place during the react phase.